The entirety of the Pokémon World Championships 2018 livestreams. Though the press release says Pokémon Detective Pikachu is due for Summer 2019, the presentation explicitely announced the movie for next May.

These updates take effect immediately, so the final events of the 2018 Championship Series season (including the Pokémon World Championships) and the first events of the 2019 Championship Series season will use these updated rules.